“The tender was cancelled in view of certain issues raised by the bidders, which need to be deliberated on and this may take some time. A fresh tender will be issued soon after the due deliberations,” said a source privy to the developments.

Tamil Nadu’s hydro power capacity is 2307MW and much of it is situated in the Nilgiris district. Incessant rainfall in the hills helped increase hydro power generation from less than 100MW to a peak 700MW. While the total hydro generation on Saturday evening was 781MW, the same day last year, the it was 40MW.

The clean energy firm will acquire Orange Renewables for a total enterprise value of $922 million, of which, $380 million is for the equity stake and the remainder is debt held by Orange Renewables. The acquisition is fully funded by equity injections from GEH shareholders.

Tangedco harnessed 13,000 million units of wind energy and 2,905 million units of solar energy in 2017-18. Tamil Nadu is the only state to have used so much of green energy last year. The state has saved not less than 5,406 million tonnes of carbon on this count.

The prototype manganese-hydrogen battery, described in the journal Nature Energy, stands just three inches tall and generates a mere 20 milliwatt hours of electricity, which is on par with the energy levels of LED flashlights one might hang on a key ring.

Electricity generation through renewable sources -- including wind, solar, biomass, small hydro and bagasse – stood at 78,256 million units (MUs) between April 2017 and December 2017 as compared to 64,042 MUs generated in the same period last fiscal (2016-17).

"Nuclear is also carbon-free, it is sustainable. I think nuclear should also be eligible for that kind of subsidy (enjoyed by solar and wind) as it is also clean, says Anil Kakodkar, a former chairman of the Atomic Energy Commission.